Glass-grinding machine



(No Model) 2 Sheets-Sheet 1.

J. J. CHRISTIE.

GLASS GRINDING MACHINE.

N0. 386,738. Patented July 24, 1888.

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2 Sh'eets-Sheet 2.

(N0 Model.)

J. J. CHRISTIE.

GLASS GRINDING MACHINE.

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I I] III F, om r n 9 E W W 00 E 3 l UNITED STATES PATENT QFFICEO JAMESJ. CHRISTIE, OF RIVERSIDE, NElV JERSEY.

GLASS-=GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 386,738, dated July 24,1888.

Application filed February 23, 1887. Serial No. 228,529.

To all whom it may concern:

Be it known that 1, JAMES J. CHRISTIE, of Riverside, in the county ofBurlington and State of New Jersey, have invented anew and valuableImprovement in Glass Grinding, Stoppering, and Finishing Machines; and Ido hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the annexed drawings, making a part ofthis specification,and to the letters and figures of reference marked thereon.

Figure 1 is an elevation, partly sectional, of a power-machine forgrinding the outside of a fruit-jar or other analogous glass vessel,en1- bodying my improvements; and Fig. 2 is an enlarged sectionalelevation of the grindingdie and appliances for holding the vessel tothe die during grinding.

My invention has relation to power-machines for grinding surfaces orjoints of glassware, having reference particularly to grinding a slotupon fruit-jars, glassjars, or analogous vessels for the rubberpacking-ring or gasket interposed between said slot and lid to form aperfect air-tightjoint for the jar or vessel,said ground slot beingpreferably upon the outside surface of the shoulder of the jar, wherebyan outside true or ground surface is obtained the same as in avalve-slot.

It is well known that fruit-jars or similar glassware when molded warpor get out of true when the bodies of thejars in their plastic state arerelieved or removed from the sides of the mold, and the constant closingof the mold in forming a glass jar produces a ridge on the mouth ofthejar, so that the gasket or rubber packing fitted or clamped to theslot does not entirely or evenly close or seal the slot, and more orless air gains access to the interior of the jar through this imperfectslotting to sour the contents in thejar. By grinding a slot on thejar aneven or true surface is obtained to produce an airtight joint toperfectly preserve the contents of the jars, and by my improvements thisgrinding can be effected without much additional cost of manufacturing.

My invention accordingly consists of the novel combination,construction, and arrangement of parts, as hereinafter described andclaimed.

(No model.)

In the drawings, A represents a vertically arranged driving-shaftsuitably mounted in a frame-work, a a, of any desired construction, tothe upper beam or cross-bars, a, of which are secured spouts or chutesI) for directing a supply of dry sand or analogous abrading ma terial tostationary mixing-chambers B, suita bly arranged about shaft A. Thesemixingehambers B have suitably journaled within them agitators O, theshafts c for which have at their upper ends gear-wheels c, which meshwith a large gear-wheel, c", secured to shaft A, and above wheel 0' is adriving-pulley, 0 for said shaft.

The outlet-spouts I) of the mixing-ehambers are directed to an annulargutter, d, formed upon the outside of a stationary cone-shapeddistributer, D, suitably mounted upon the frame-work of the machine, asdesired. From the annular gutter d proceed longitudinal gutters d, forconveying the mixed sand and water from gutter d to the grinding-dies,located about the driving-shaft below the cone D, as hereinafterdescribed. As the sand is fed into the mixing-chambers B from spouts orchutes b, water is also admitted to said chambers by suitablyarrangedpipes, I), loading to said chambers, and the rotation of the agitators Oin the chamber B mix the sand and water and force the same out throughthe spouts or nozzles b to cone D.

a a represent two parallel circular stationary frames loose on shaft A,and held in position by collars a on said shaft, as shown, and securedto the stationary uprights A, which form part of the frame of the wholedevice.

Upon the upper side of frame a near its outside edge and at suitableintervals around the frame, are secured invertedU shaped lugs orbracketf, each forming an upper bearing for a loose orsliding verticalbar,j", which has its lower bearing in the frame a and is provided witha collar,f", located above frame a, and a spring, f", between saidcollar and bracketf, as shown in Fig. 1. At the lower end of each barfis a rubber or other elastic pad or cushion, f*, which bears against thebottom of a jar, F, when in position for grinding. Above the cushionfand fitted to bar f is a frame or series of radial bars, f havingdownwardly-projecting spring-fingers f, for clamping the sides of thejar, and act in ed ICC operation with the cushion f* to hold' the jarfirmly in position or to the grinding-die dur ing the operation ofgrindiufg the slot on the jar for the rubber packing for its lid-joint.

In a machine built for grinding only one size or diameter of jars thespring-fingers f are rigidly or permanently secured to bars F, as shownin Fig. 1; but in machines adapted for different diameters of jars thespring-fingers slide in grooves f in bars f and have setscrewsf to clampthem in position when adjusted to suit jars of different diameters, asshown in Fig. 2, which also indicates that the lugsf may be located uponthe under side of frame a.

G represents a cup having a central depression, g, to receive the mouthof a jar, F, as shown in Fig. 1. This depression gforms a die forgrinding thejar-mouth even and true. Cup G is secured to vertical shaftin alignment with barf, and it has bearings in lower frame, a andbrackets attached to the under side of said frame, and it is alsoprovided with a gear-wheel, g meshing with a larger gear-wheel, 9*,secured to shaft A, whereby the shaft and cup G are rotated to effectingthe grinding of the glassware. As the cup G is rotated, the sand andwater is conducted to the cup from a channel, 11, upon cone D, such sanddropping from the lower edge of the cone onto the cup G. As many cups Gand rotating mechanism therefor are employed as there are bars fandspring-holdersfon the upper frame, a. The surplus sand and waterdropping onto cups G is conducted away by means of outletpipes oropenings 9 Instead of making the die integral with cup G, the same maybe separate therefrom, as shown in Fig. 2, and differently-configureddies are used, according to the location of the slot upon the glassware.As shown in Fig. 2,

the die has an inclined or tapering top surface, 9, to grind the slotupon the outside surface of the shoulder F.

sasjse I donotlimit myself to any particular framework for the machine,nor to the number of the grinding devices rotated by the drivingshaft A,as it is obvious that the number depends upon the capacity desired forthe machine.

What I claim is- 1. In a glassware-grinding machine, the combination ofa driving-shaft, stationary mixing-chambers B, cone D, having annularchannel (I, and longitudinal channels (1 around said cone, a stationaryframe located below said cone, and having spring-acting bars provided attheir lower ends with a cushion and spring-fingers, a second stationaryframe below the former, having shafts in alignment with saidspring-acting bars, cups provided with grinding-dies secured to saidshafts, and mechanism between the latter and the driving-shaft forrotating said cups and grindingdies, substantially as set forth. 2. Incombination with shaft A, the sta tionary frames aa, spring-acting rodsf having cushion f and spring-fingers f, on one of said frames, cups G,having grinding-dies g and shafts g, and mechanisms between shafts g andshaft A, for rotating said cups and grinding-dies, substantially as setforth.

3. In a grinding-machine, the combination of the stationary frames a' 'aspring-acting bars f, having adjustablespring-fingersf, rotating cups G,having grinding-dies g with inclined grinding edge or surface g, andoutlet 9 from said die, substantially as set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

ALLEN H. GANGEWER, OTIS EGAN.

